Numerical and experimental lifetime prediction for multiaxial loaded air-spring systems

多轴加载空气弹簧系统的数值和实验寿命预测

基本信息

批准号：
195623579
负责人：
Professor Dr.-Ing. Uwe Weltin
金额：
--
依托单位：
Institut für Strukturmechanik im Leichtbau
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2011
资助国家：
德国
起止时间：
2010-12-31 至 2017-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/195623579?language=en
关键词：
Numerical experimental lifetime prediction multiaxial

项目摘要

The aim of this research project is the life time prediction of multiaxial loaded air-spring systems on the basis of a local fatigue and damage concept. Due to the external loads, the implementation of more compact and more powerful systems leads to an increase in the internal pressure in the air-spring bellow. To meet the increased demands of such air-spring systems, an optimization of the strength and the use of materials corresponding to the real, expected loads is required. To date, the individual failure mechanisms in the composite material of the bellow under complex loadings are not sufficiently clarified. This research project focuses in the numerical determination of the local stress and strains under multi-axial loadings based on multi-scale models and the experimental investigation of air-spring systems. In order to validate calculations, specimen tests and component tests shall be carried out. To look at the interface of the cord rubber composites, new specimens have been designed. The results of the tests on these specimens should lead to a better understanding of the failure mechanisms of the composite material. At the end of the research project, tests according to the life time of whole air-spring systems shall be done to validate the developed methods. For the investigations on whole air-spring systems a hexapod test rig funded by the DFG shall be used. The results obtained should be able to be applied generally to air-spring systems and make the development process more efficient.

该研究项目的目的是基于当地疲劳和损害概念的多轴负载空气弹簧系统的终身预测。由于外部负载，实施更紧凑，更强大的系统会导致空气弹簧波纹管的内部压力增加。为了满足此类空气弹簧系统的需求增加，需要优化与实际，预期负载相对应的材料的优化。迄今为止，在复杂负荷下的孔乐复合材料中的单个故障机制尚未充分阐明。该研究项目的重点是基于多尺度模型的多轴负载下局部应力和菌株的数值确定以及空气弹簧系统的实验研究。为了验证计算，应进行样品测试和组件测试。为了查看绳索橡胶复合材料的界面，已经设计了新的标本。这些标本的测试结果应导致更好地理解复合材料的失败机理。在研究项目结束时，应根据整个空气弹簧系统的寿命进行测试以验证开发的方法。对于整个空气弹簧系统的调查，应使用由DFG资助的Hexapod测试钻机。所获得的结果应一般应用于空气系统，并使开发过程更有效。